Oxidation of Chromanones and 2-Spirochromanones with [Hydroxy(tosyloxy)iodo]benzene in Acetonitrile Under Reflux as well as Ultrasound: A Convenient Route for the Synthesis of Chromones, Tetrahydroxanthones, and Their Higher Homologues
作者： Devinder Kumar , Om V. Singh , Om Prakash , Shiv P. Singh
DOI: 10.1080/00397919408010576
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摘要: Abstract Oxidation of chromanones (1a-i) and 2-spiro-chromanones (j-m) using [hydroxy(tosyloxy)iodo] benzene in refluxing acetonitrile as well ultrasound via dehydrogenation 2,3-alkyl migration provides a convenient route for the synthesis chromones (2a-i), tetrahydroxanthones (2j,k) their higher homologues (21,m). The also enhances substantially rate above transformations.
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